Stop motion foe knitting machines



(No Model.)

Patented Ju1y'7, 1891 A BOEHMEN STOP MOTION FOR KNITTING MAGHINE S. v v

UNITED STATES PATENT OFFICE.

ADOLPI-I BOEHMEN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO TI-IE ROCKFORD MITTEN AND I'IOSIERY COMPANY.

STOP-MOTION FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 455,699, dated July '7, 1891. Application filed October 24, 1890; Serial No. 369,252- (No model.)

T at whom, it may concern: Upon a plate 17 is mounted the support for Be it known that I, ADOLPH BOEHMEN, a the take-up arm 18. This take-up arm has citizen of the United States, residing at Bockone end coiled around a shaft 19 and the end ford, in the county of Vinnebago and State connected with one of the uprising cars 20.

of Illinois, have invented certain newand After a number of coils around the shaft the 5 useful Improvements in Stop -Motions forarm 18 extends outward and is provided with Knitting-Machines, of which the following is a loop 21 at its free end. The yarn passes a specification. through the guide 22, thence through the eye The object of this invention is to automati- 23, up through the loop 21 in the end of the to cally stop a knitting-machinewhen from any arm 18, and thence down to the knitting-nee- 6o cause a yarn becomes broken, the supply eX- dles. The coils of the arm 18 furnish the hausted, or the tensionslackened. necessary tension to the arm to take up the In the accompanying drawings, Figure 1 is slack of the yarn. A shaft 24 is held in its an isometrical representation of a portion of a vertical position by passing through brackets I5 knitting-machine andits driving mechanism, 25 and 26, secured to the upright support 16. showing my improvements in connection A horizontal arm 25 passes through this shaft therewith. Fig. 2 is an elevation illustrating near its lower end, fora purpose to appear the parts for imparting motion to the needlehereinafter. A'collar26 is set-screwed to the operating slide. shaft 24 below the bracket 25, leaving suffi- 20 Such portions of a knitting-machine as cient distance for a coil-spring 27, which sur- 7o herein represented, consisting of the baserounds the shaft. This shaft has a vertical frame 1, needle-bed 2, needle-operating slide movement in its bearings, and the action of 3, and the device for operating the needlethe coi1-spring 27 tends to press, the shaft slide, consisting of the crank 4 and connectdownward, carrying the parts attached there- 25 ing-link 5, may be of any of the known deto. The collar 26 has a groove 28 cut in its vices, and are here represented for the purouter surface. A rod 29, of the form shown, pose of showing the application of my imhas a pivotal connection with the bracket 25 provements. A horizontal shaft 6 is supby means of the clamp 30, connected to the ported from the base-frame by a bracket 7, rod and pivotally connected withthe bracket.

0 and a driving-pulley 8 is keyed or otherwise .The lower end of this rod is curved and the secured to said shaft, motion being imparted extreme lower end engages the upper side of to this pulley by means of a belt 9, connected the groove 28 of the collar 26. A weight is to a prime mover. The rotary motion imattached to the rod 29 below its connection parted to the shaft 6 imparts a reciprocatwith the bracket, so as to insure the engage- 35 ing movement to the needle-operating slide ment of the rod with the collar. The upper through the medium of the connecting-crank end of the rod terminates with a transverse 4 and link 5. A loose pulley 10 is also bar 31. Below the bracket 26 is pivoted a mounted upon the horizontal shaft 6 and horizontal arm 32, having its upper face upon which the belt 9 may be shifted to stop slightly grooved, as at 33, transversely to its 40 the running of the machine. A belt-shifting lengthwise direction. A flat spring 34 is condevice is employed, consisting of a loop 11, nected at one end to the under side of the surrounding the belt 9, having a rod 12 exarm 32 and its free end rests .upon the base tending within easy reach of the operator 1, thus holding the arm in a yielding manand having a hand-hold 13 at its free end. ner. A horizontal arm 35 is pivoted at 36 to 5 This shifting-rod 12 is supported by arms l-ct a bracket 37, secured to the base 1. The 5 and 15, connected with the bracket 7. By longer portion of this arm engages the belt means of this rod 12 the belt may be shifted. shifting rod 12, its shorter end fitting into the to stop or start the machine, as desired. groove 33 in the arm 32. A spiral spring 32% Ayarn guide and tension device is mounted has one end connected to the longer portion 50 upon a standard 16, secured to the base 1. of the arm 35 and its other end connected to the main frame. From near the end of the shorter portion of the bar project two arms 38 and 39.

is broken, the tension slackened, or the sup-- ply exhausted, the arm 18, by reason of its spring action, will fly backward and come in contact with the transverse arm 31, thereby rocking it on its pivot and releasing its hold on the collar 26. The action of the coil-spring 27 will force the vertical shaft downward, which, coming in contact with the bar 32, forces it to release its hold on the bar 35, which in turn by turning upon its pivot through the'action of the spring 32% will move the rod 12, consequently shifting the belt from the driving-pulley onto the loose pulley, thereby stopping the machine from further knitting. The action of the bar 35 is not only to shift the belt, but in so doing the curved arms 38 and 39 will come in contact with the cross-arm 25, (when it is in its lowest position,) thereby returning the vertical shaft to its original position. The machine is again supplied with yarn, which will return the take-up arm 18 to its original position, relieving the arm 29, permitting it to again engage the collar. By means of the hand-hold 13 in the arm 12 the belt is shifted from the loose pulley onto the driving-pulley andthe machine again started. In shifting the belt to start the machine the lever 35 will be returned to its engagement with the lever 32, ready to repeat the operation when occasion should require.

I have shown only one thread; but any number maybe employed, and the failure of any one will operate the mechanism by employing a lever 18 for each thread, so that any one of such levers will trip the bolt-releasing device.

I claim as my invention- 1. In a fabric-producin g machine, the combination, with a pivoted lever for shifting a belt, of a spring-actuated bolt for releasing the belt-shifting lever, and a detent holding said bolt against its spring action, the detent being released by the slackening of the tension of the thread and the belt-shifting lever in its movement replacing the spring-actuated bolt to itsnormal. position, substantially as set forth.

2. The combination of a vertical springactuated shaft having a transverse rod near its lower end, a detent holding said shaft against its spring action, and a belt-shifting bar provided with arms which engage the transverse rod and return it to its normal position, substantially as set forth.

3. The combination, with a belt-shifting mechanism, of a spring-actuated bolt for releasing the belt-shifting mechanism, a collar secured to the spring-actuated bolt, and a weighted detent engaging the collar, said detent being released by the slackening of the tension of the -thread, substantially as set forth.

AD OLPH BOEHMEN.

Vitnesses:

C. E. HEILYER,

O. BEHEL. 

